How often do you let air out? Or is it occasionally adding more air which should be easy enough (although perhaps difficult to get the exact pressure).
I bet you could sell it on Craigslist or Facebook Marketplace, although it may not be easy to fill up at home. Perhaps one could use an old pressurized paint pot to push it in.
I'd like to clean up my wheels and rims on the old Ford sometime, and probably change fluids. I occasionally get up into Washington, but rarely into north central Washington.